Sun 16-Dec-12 11:59 AM | edited Sun 16-Dec-12 02:51 PM by mklass
I doubt it will harm your camera. The main issue is quality and durability. I use a Zeikos knock-off that I bought from B&H. It's lasted 2 years so far and cost about $10.00. I have used cheaper ones in the past and had problems with broken wires and connections that don't stand up to repeated flexing. But you can buy quite a few replacements before equaling the price of a Nikon version.
However, I seem to recall that gpoole reported some problem here with his D800 and a 3rd party 10 pin connection. I'm not sure if his situation is relevant to this discussion.